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Fixed #6899 -- Fixed a problem with boolean evaluation of empty querysets.

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Based on patches from cide@ctmod.net and brodie.


git-svn-id: http://code.djangoproject.com/svn/django/branches/queryset-refactor@7417 bcc190cf-cafb-0310-a4f2-bffc1f526a37
This commit is contained in:
Malcolm Tredinnick 2008-04-13 03:22:38 +00:00
parent cfb706385b
commit ed23f00a00
2 changed files with 8 additions and 1 deletions
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1
django/db/models/query.py
View File

@ -73,6 +73,7 @@ class _QuerySet(object):
except StopIteration:
return False
return True
return bool(self._result_cache)
def __getitem__(self, k):
"Retrieve an item or slice from the set of results."

6
tests/regressiontests/queries/models.py
View File

@ -584,6 +584,12 @@ Test that parallel iterators work.
>>> i1.next()
<Tag: t3>
>>> qs = X.objects.all()
>>> bool(qs)
False
>>> bool(qs)
False
We can do slicing beyond what is currently in the result cache, too.
# FIXME!! This next test causes really weird PostgreSQL behaviour, but it's